// JavaScript Document
jQuery.extend({
    createUploadIframe: function (id, uri)
    {
        //create frame
        var frameId = 'jUploadFrame' + id;        
        if (window.ActiveXObject) {
        	
            //if (jQuery.browser.version == '9.0') {
            if ($.support.leadingWhitespace){
                io = document.createElement('iframe');
                io.id = frameId;
                io.name = frameId;
            //} else if (jQuery.browser.version == '6.0' || jQuery.browser.version == '7.0' || jQuery.browser.version == '8.0') {
            }else{            		       
	            var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
	            if (typeof uri == 'boolean') {
	                io.src = 'javascript:false';
	            } 
	            else if (typeof uri == 'string') {
	                io.src = uri;
	            }
            }
        } 
        else {
            var io = document.createElement('iframe');
            io.id = frameId;
            io.name = frameId;
        }
        io.style.position = 'absolute';
        io.style.top = '-1000px';
        io.style.left = '-1000px';
        document.body.appendChild(io);
        return io;
    },
    createUploadForm: function (id,parentElementId, fileElementId)
    {
        //create form 
        var formId = 'jUploadForm' + id;
        var fileId = 'jUploadFile' + id;
        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
        console.log(parentElementId);
        //var oldElement = jQuery('#' + fileElementId);
        var oldElement;
        if(parentElementId&&parentElementId!=null&&parentElementId!=''){
        	oldElement=$("#"+parentElementId).find('#' + fileElementId);
        }else{
        	oldElement=$("#"+fileElementId);
        }        
        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr('id', fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);
        //set attributes
        jQuery(form).css('position', 'absolute');
        jQuery(form).css('top', '-1200px');
        jQuery(form).css('left', '-1200px');
        jQuery(form).appendTo('body');
        return form;
    },
    ajaxFileUpload: function (s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout  
        s = jQuery.extend({
        }, jQuery.ajaxSettings, s);
        var id = s.fileElementId;
        var form = jQuery.createUploadForm(id,s.parentElementId, s.fileElementId);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;
        if (s.global && !jQuery.active++)
        {
            // Watch for a new set of requests
            jQuery.event.trigger('ajaxStart');
        }
        var requestDone = false;
        // Create the request object
        var xml = {
        };
        if (s.global)
        {
            jQuery.event.trigger('ajaxSend', [
                xml,
                s
            ]);
        }
        var uploadCallback = function (isTimeout)
        {
            // Wait for a response to come back 
            var io = document.getElementById(frameId);
            try
            {
                if (io.contentWindow)
                {
                    xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
                    xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
                } else if (io.contentDocument)
                {
                    xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
                    xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
                }
            } catch (e)
            {
                //jQuery.handleError(s, xml, null, e);
            }
            if (xml || isTimeout == 'timeout')
            {
                requestDone = true;
                var status;
                try {
                    status = isTimeout != 'timeout' ? 'success' : 'error';
                    // Make sure that the request was successful or notmodified
                    if (status != 'error')
                    {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData(xml, s.dataType);
                        if (s.success)
                        {
                            // ifa local callback was specified, fire it and pass it the data
                            s.success(data, status);
                        };
                        if (s.global)
                        {
                            // Fire the global callback
                            jQuery.event.trigger('ajaxSuccess', [
                                xml,
                                s
                            ]);
                        };
                    } else
                    {
                        //jQuery.handleError(s, xml, status);
                    }
                } catch (e)
                {
                    status = 'error';
                    //jQuery.handleError(s, xml, status, e);
                };
                if (s.global)
                {
                    // The request was completed
                    jQuery.event.trigger('ajaxComplete', [
                        xml,
                        s
                    ]);
                };
                // Handle the global AJAX counter
                if (s.global && !--jQuery.active)
                {
                    jQuery.event.trigger('ajaxStop');
                };
                if (s.complete)
                {
                    s.complete(xml, status);
                };
                jQuery(io).unbind();
                setTimeout(function ()
                {
                    try
                    {
                        jQuery(io).remove();
                        jQuery(form).remove();
                    } catch (e)
                    {
                        //jQuery.handleError(s, xml, null, e);
                    }
                }, 100);
                xml = null;
            };
        }
        // Timeout checker

        if (s.timeout > 0)
        {
            setTimeout(function () {
                if (!requestDone)
                {
                    // Check to see ifthe request is still happening
                    uploadCallback('timeout');
                }
            }, s.timeout);
        }
        try
        {
            var form = jQuery('#' + formId);
            jQuery(form).attr('action', s.url);
            jQuery(form).attr('method', 'POST');
            jQuery(form).attr('target', frameId);
            if (form.encoding)
            {
                form.encoding = 'multipart/form-data';
            } 
            else
            {
                form.enctype = 'multipart/form-data';
            }
            jQuery(form).submit();
        } catch (e)
        {
            //jQuery.handleError(s, xml, null, e);
        }
        if (window.attachEvent) {
            document.getElementById(frameId).attachEvent('onload', uploadCallback);
        } 
        else {
            document.getElementById(frameId).addEventListener('load', uploadCallback, false);
        }
        return {
            abort: function () {
            }
        };
    },
    uploadHttpData: function (r, type) {
        var data = !type;
        data = type == 'xml' || data ? r.responseXML : r.responseText;
        // ifthe type is "script", eval it in global context
        if (type == 'script')
        {
            jQuery.globalEval(data);
        }
        // Get the JavaScript object, ifJSON is used.

        if (type == 'json')
        {
            eval('data = ' + data);
        }
        // evaluate scripts within html

        if (type == 'html')
        {
            jQuery('<div>').html(data).evalScripts();
        }
        return data;
    }
});
